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npm · npm:is-json

is-json active

Check if a value is a valid JSON object/array string (or a plain object), without try/catch on the caller side.

The latest stable version of is-json is 3.0.1, published on 2026-05-27. Verified by Vigia on 2026-11-12.

Latest stable version3.0.1
Published2026-05-27 00:29:10 UTC
Installnpm install is-json@latest
Requires (engines){"node":">=18"}
Peer dependencies—
Dist-tagslatest: 3.0.1
LicenseISC
Advisories on latest versionnone known
Last verified2026-11-12 12:37:40 UTC
Sourcesapi.deps.dev, registry.npmjs.org, registry.npmjs.org

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Maintenance

Activityactive
Last stable release2026-05-27 00:29:10 UTC · 169 days ago
Stable releases in the last 12 months2
Published versions12

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

VersionPublished
3.0.12026-05-27 00:29:10 UTC
3.0.02026-05-26 23:10:23 UTC
2.0.12016-09-17 16:29:51 UTC
2.0.02016-03-03 18:06:03 UTC
1.2.52014-07-02 16:52:12 UTC
1.1.52014-07-02 16:39:06 UTC
1.1.42014-07-02 00:40:14 UTC
1.1.32014-05-25 17:17:36 UTC
1.1.22014-05-20 20:31:45 UTC
1.1.12014-04-22 10:56:19 UTC
1.0.12014-04-21 23:01:14 UTC
1.0.02014-04-21 22:56:55 UTC

Showing the 12 most recent of 12 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

RuntimeNewest compatible version
node 162.0.1
node 183.0.1
node 203.0.1
node 223.0.1
node 243.0.1

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Frequently asked questions

What is the latest version of is-json?

The latest stable version of is-json is 3.0.1, published on 2026-05-27. Verified by Vigia on 2026-11-12.

How do I install the latest version of is-json?

Run npm install is-json@latest. The latest stable version is 3.0.1 (verified 2026-11-12).

Is is-json deprecated?

No. is-json is not marked as deprecated in the registry.

Which Node.js version does is-json require?

is-json 3.0.1 declares this requirement: {"node":">=18"}.

Does is-json 3.0.1 have known vulnerabilities?

No known advisories affect is-json 3.0.1 according to the data Vigia checks.

Is is-json still maintained?

is-json published 2 stable releases in the last 12 months; the most recent was 169 days ago. Activity: active.

Observed changes

No changes observed yet since Vigia started tracking this package.

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